广播接收器上android.net.conn.CONNECTIVITY_CHANGE多次调用 [英] BroadcastReceiver on android.net.conn.CONNECTIVITY_CHANGE called multiple times

问题描述

我在我的清单以下

 ＆lt;接收机器人：名字=。receiver.WifiReceiver＆GT;
            ＆所述;意图滤光器＆gt;
                ＆lt;作用机器人：名字=android.net.conn.CONNECTIVITY_CHANGE/＆GT;
            ＆所述; /意图滤光器＆gt;
 ＆LT; /接收器＆GT;
 

和以下的BroadcastReceiver：

 公共类WifiReceiver扩展广播接收器{
私有静态字符串标记= makeLogTag（WifiReceiver.class）;@覆盖
公共无效的onReceive（上下文的背景下，意图意图）{    ConnectivityManager connectivityManager =（ConnectivityManager）
            context.getSystemService（Context.CONNECTIVITY_SERVICE）;
    的NetworkInfo NETWORKINFO = NULL;
    如果（connectivityManager！= NULL）{
        NETWORKINFO =
                connectivityManager.getNetworkInfo（ConnectivityManager.TYPE_WIFI）;        LOGD（TAG的连接信息：+ NETWORKINFO）;
    }   如果（NETWORKINFO = NULL＆放大器;！＆安培; networkInfo.isConnected（））{
       // TODO：为什么这个被多次调用和处理进度重装
       LOGD（TAG，有Wifi连接，并连接）;
   }其他
       LOGD（TAG，没有无线连接或没有连接）;
}
 

当我从手机切换到接收器获得多次调用（也没问题），但在WiFi
  如果（NETWORKINFO = NULL＆放大器;！＆安培; networkInfo.isConnected（））分支计算为true的所有4次

解决方案

 公共类NetworkChangeReceiver扩展广播接收器{
上下文mContext;@覆盖
公共无效的onReceive（上下文的背景下，意图意图）{
    mContext =背景;
    字符串状态= NetworkUtil.getConnectivityStatusString（背景）;    Log.e（接收器，+状态）;    如果（status.equals（未连接互联网））{
        Log.e（接收器，不connction）; //你的code当互联网失去了
    }其他{
        Log.e（接收器，连接到互联网）; //你的code当互联网连接回来
    }}
 

}

和使用要求检查WiFi或互联网conenctivity失去

 公共类NetworkUtil {公共静态INT TYPE_WIFI = 1;
公共静态INT TYPE_MOBILE = 2;
公共静态INT TYPE_NOT_CONNECTED = 0;公共静态INT getConnectivityStatus（上下文的背景下）{    ConnectivityManager厘米=（ConnectivityManager）上下文
            .getSystemService（Context.CONNECTIVITY_SERVICE）;    的NetworkInfo activeNetwork = cm.getActiveNetworkInfo（）;    如果（NULL！= activeNetwork）{        如果（activeNetwork.getType（）== ConnectivityManager.TYPE_WIFI）
            返回TYPE_WIFI;        如果（activeNetwork.getType（）== ConnectivityManager.TYPE_MOBILE）
            返回TYPE_MOBILE;
    }
    返回TYPE_NOT_CONNECTED;
}公共静态字符串getConnectivityStatusString（上下文的背景下）{    康涅狄格州INT = NetworkUtil.getConnectivityStatus（背景）;    字符串状态= NULL;
    如果（康涅狄格州== NetworkUtil.TYPE_WIFI）{
        //状态=WLAN网络;
        状态=Internet连接可用;
    }否则如果（康恩== NetworkUtil.TYPE_MOBILE）{
        //状态=移动数据已启用;
        状态=Internet连接可用;
    }否则如果（康恩== NetworkUtil.TYPE_NOT_CONNECTED）{
        状态=未连接互联网;
    }
    返回状态;
}
 

}

和你androidmanifest文件中添加此

 ＆lt;接收
        机器人：名字=。NetworkChangeReceiver
        机器人：标签=NetworkChangeReceiver＆GT;
        ＆所述;意图滤光器＆gt;
            ＆lt;作用机器人：名字=android.net.conn.CONNECTIVITY_CHANGE/＆GT;
            ＆lt;作用机器人：名字=android.net.wifi.WIFI_STATE_CHANGED/＆GT;
        ＆所述; /意图滤光器＆gt;
    ＆LT; /接收器＆GT;
 

我希望这是对你的工作以及

I have the following in my manifest

 <receiver android:name=".receiver.WifiReceiver" >
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            </intent-filter>
 </receiver>

and the following BroadcastReceiver:

public class WifiReceiver extends BroadcastReceiver { 
private static String TAG = makeLogTag(WifiReceiver.class);

@Override
public void onReceive(Context context, Intent intent) {

    ConnectivityManager connectivityManager = (ConnectivityManager)
            context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo networkInfo = null;
    if (connectivityManager != null) {
        networkInfo =
                connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        LOGD(TAG, "connectivity info:" + networkInfo);
    }

   if(networkInfo != null && networkInfo.isConnected()) {
       //TODO: see why this is called multiple times and handle schedule reloading
       LOGD(TAG, "have Wifi connection and is connected");
   }else
       LOGD(TAG, "don't have Wifi connect or it isn't connected");
}

When i switch from mobile to wifi the receiver get called multiple times (no problem there) but the if(networkInfo != null && networkInfo.isConnected()) branch evaluates to true all 4 times

解决方案

public class NetworkChangeReceiver extends BroadcastReceiver {
Context mContext;

@Override
public void onReceive(Context context, Intent intent) {
    mContext = context;
    String status = NetworkUtil.getConnectivityStatusString(context);

    Log.e("Receiver ", "" + status);

    if (status.equals("Not connected to Internet")) {
        Log.e("Receiver ", "not connction");// your code when internet lost


    } else {
        Log.e("Receiver ", "connected to internet");//your code when internet connection come back
    }

}

}

and use this call for check wifi or internet conenctivity lost

public class NetworkUtil {

public static int TYPE_WIFI = 1;
public static int TYPE_MOBILE = 2;
public static int TYPE_NOT_CONNECTED = 0;

public static int getConnectivityStatus(Context context) {

    ConnectivityManager cm = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();

    if (null != activeNetwork) {

        if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
            return TYPE_WIFI;

        if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
            return TYPE_MOBILE;
    }
    return TYPE_NOT_CONNECTED;
}

public static String getConnectivityStatusString(Context context) {

    int conn = NetworkUtil.getConnectivityStatus(context);

    String status = null;
    if (conn == NetworkUtil.TYPE_WIFI) {
        //status = "Wifi enabled";
        status="Internet connection available";
    } else if (conn == NetworkUtil.TYPE_MOBILE) {
        //status = "Mobile data enabled";
        status="Internet connection available";
    } else if (conn == NetworkUtil.TYPE_NOT_CONNECTED) {
        status = "Not connected to Internet";
    }
    return status;
}

}

and add this in your androidmanifest file

<receiver
        android:name=".NetworkChangeReceiver"
        android:label="NetworkChangeReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
        </intent-filter>
    </receiver>

i hope it's work for you and

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